*{
    margin: 0;
    padding: 0;
}
html,body {
  width: 100%;
  height: 100%;
}

#mainBody{
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 204, .5);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    position: absolute;
}

#title{
    width: 100%;
    height: 10vh;
    position: relative;
}
#setbutton{
    position: absolute;
    left: 10px;
    top: 10px;
    width: 35px;
    height: 35px;
    border-radius: 5px;
    background-color: #9F8B77;
    background-image: url(../images/set.png);
    background-repeat: no-repeat;
    background-size: 25px 25px;
    background-position: center;
    cursor: pointer;
}
#showbutton{
    position: absolute;
    left: 50%;
    margin-left: -17.5px;
    top: 10px;
    width: 35px;
    height: 35px;
    border-radius: 5px;
    background-color: #9F8B77;
    background-image: url(../images/auto.png);
    background-repeat: no-repeat;
    background-size: 25px 25px;
    background-position: center;
    cursor: pointer;
}

#board{
    width: 100%;
    min-width: 300px;
    max-width: 500px;
    height: 100%;
    background-image: url(../images/bg_main.jpg);
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center;
    position: relative;
}